Improvement in nut-locks



Uivrrnn STATES EDW1N H. DOOLEY, OF NEW YORK, N. Y.

IMPROVEMENT IN NUT-LOCKS.

Specification forming part of Letters Patent No. 122,761, dated January 16, 1872.

Specification describing an Improved Nut- Lock, invented by EDWIN H. DooLEY, ofthe city, county, and State of New York.

Figure 1 represents a side view of my im proved locking-pin. Fig. 2 is a side view of the bolt; and Fig. 3, a longitudinal section of bolt, nut, and lock.

Similar letters of reference indicate corresponding parts.

rlhis invention relates to a new and effective but very simple nut-lock, to be applied to rail road rails and other purposes; and consists in the use of a locking-pin Which enters a groove along' the whole length of the bolt, and has a sharp edge or edges near one end for cutting the thread of the nut, While the other end is bent over the head of the bolt. In' this manner an absolute lock is produced Which cannot possibly Work loose, and therefore greatly in sures the safety ofthe bolts. i

A in the drawin g represents the bolt, grooved along its entire length at a for the reception of the locking-pin B, and provided With a screwthread, b, at one end and a head, c, at the other end. C is the nut to be applied to the bolt.

The pin B Vis longer than thevbolt, and has near its outer end one4 or more projectng'butting edges, d, and above that a head, e.

When the nut has vbeen applied the pin B is fitted into the groove of the bolt so that its edge or edges d Wiullwmomqein contact Withmand cutthe thread o 'f the ngt. Thmemiiiiirendbf as shown in Fig. 3, thereby retaining it firmly i in place, the edge d, Which enters the nut,

holding the latter secure so it cannot turn.

The head e rests against the face of the nut and prevents the pin from being drawn inward.

The pin can be readily removed, When desired, by bending' its inner end straight, or cutting it off, and then driving out the pin to e11- able the nut to be unscrewed.

Havin g thus described my invention, I claim as new and desire to secure by Letters Patent- The headed pin B d e, passing through nut C and bent over the end of grooved bolt, all as described, and for the purpose of locking the nut so that it Will not only be held firmly While the pin remains, but so that the pin itself cannot iiy out.

t EDWIN H. DOOLEY.

T. B. MosHER. (1@ 

